Sunroof glass and vehicle

Abstract

The present application provides a sunroof glass and a vehicle. The sunroof glass includes a glass substrate, a metal absorbing layer, and an anti-reflection layer. The glass substrate has an outer surface and an inner surface. The metal absorbing layer and the anti-reflection layer are sequentially stacked on the inner surface along a direction away from the glass substrate. The sunroof glass according to the present application can reduce the visible light reflectance of the surface of the sunroof glass facing the inside of the vehicle, and can improve the visual experience of passengers when looking outside the vehicle from inside the vehicle.

Description

[Technical Field]

[0001] Reference to related applications This application claims priority to Chinese Patent Application No. 202210109009.0, filed on 28 January 2022, with the title of the invention "Sunroof Glass and Vehicle," and all contents of that application are incorporated herein by reference.

[0002] This application relates to the technical field of transportation, and more particularly to sunroof glass and vehicles. [Background technology]

[0003] With the continued development of the automotive industry, many vehicles are improving the lighting and appearance of the vehicle by improving the structure of the sunroof glass. However, as the area of ​​the sunroof glass increases, the amount of light entering the vehicle becomes excessive, which not only affects the visual experience of passengers but also raises the temperature inside the vehicle, affecting thermal comfort. In the past, this problem has been mitigated by reducing the visible light transmittance of the sunroof glass, for example by using tinted glass, tinted polyvinyl butyral (PVB), or by adding dimming elements. However, even though the visible light transmittance of the sunroof glass is reduced, the visible light reflectance of the sunroof glass measured from the inside of the vehicle remains high. As a result, a noticeable mirror effect occurs on the sunroof glass, and the display of the center console or other electronic devices inside the vehicle is clearly reflected in the sunroof glass, which can be distracting for rear-seat passengers. [Overview of the project]

[0004] This application provides a sunroof glass and a vehicle. This reduces the visible light reflectivity of the sunroof glass surface facing inward, thereby improving the visual experience of passengers when viewing the outside from inside the vehicle.

[0005] In a first embodiment, this application provides a sunroof glass. The sunroof glass comprises a glass substrate, a metal absorption layer, and an anti-reflective layer. The glass substrate has an outer surface and an inner surface. Along the direction away from the glass substrate, the metal absorption layer and the anti-reflective layer are sequentially laminated on the inner surface.

[0006] In one possible embodiment, the sunroof glass further comprises a first protective layer, which is provided on the inner surface and located between the inner surface and the metal absorption layer.

[0007] In one possible embodiment, the sunroof glass further comprises a second protective layer, which is provided on the surface of the anti-reflective layer, away from the metal absorption layer.

[0008] In one possible embodiment, the anti-reflective layer comprises at least one laminate consisting of a high refractive index layer and a low refractive index layer. The refractive index of the high refractive index layer is 1.7 or greater, and the refractive index of the low refractive index layer is less than 1.7.

[0009] In one possible embodiment, the sunroof glass further comprises a low-emissivity layer. The low-emissivity layer is provided between the first protective layer and the metal absorption layer.

[0010] In one possible embodiment, the low-emissivity layer comprises one or more of the following: an indium tin oxide (ITO) layer, a fluorine-doped tin oxide (FTO) layer, an antimond-doped tin oxide (ATO) layer, and an aluminum-doped zinc oxide (AZO) layer.

[0011] In one possible embodiment, the sunroof glass further comprises a barrier layer, which is located between the low-emissivity layer and the metal-absorbing layer.

[0012] In one possible embodiment, the glass substrate is laminated glass, which includes an inner glass, an outer glass, and an intermediate layer connected between the outer glass and the inner glass. The inner glass has a first surface and a second surface opposite to the first surface, the first surface being the inner surface. The outer glass has a third surface and a fourth surface opposite to the third surface, the fourth surface being the outer surface.

[0013] In one possible embodiment, the glass substrate further includes an infrared reflective layer. The infrared reflective layer is provided on a second surface and / or a third surface.

[0014] In one possible embodiment, the visible light transmittance of the sunroof glass is in the range of 1% to 20%. The visible light reflectance of the sunroof glass, measured from the inner surface, is 4% or less. In the Lab color space, the reflected color of the sunroof glass, measured from the inner surface, has an a value in the range of -6 to 2 and a b value in the range of -12 to 0.

[0015] In one possible embodiment, the visible light transmittance of the outer glass is 70% or more, the visible light transmittance of the inner glass is 70% or more, and the visible light transmittance of the intermediate layer is in the range of 1% to 30%.

[0016] In one possible embodiment, the visible light transmittance of the outer glass is 50% or less, the visible light transmittance of the inner glass is 50% or less, and the visible light transmittance of the intermediate layer is 70% or more.

[0017] In one possible embodiment, a dimming element is further provided between the second and third surfaces. The dimming element includes one or more of the following: polymer dispersed liquid crystal (PDLC) dimming film, polymer network liquid crystal (PNLC) dimming film, suspended particle device (SPD) dimming film, or electrochromic (EC) dimming film.

[0018] In one possible embodiment, the glass substrate is a single sheet of tempered glass, and the thickness of the single sheet of tempered glass is 5 mm or more.

[0019] In one possible embodiment, the single-pane tempered glass is colored glass. The total iron content of the colored glass, expressed as Fe2O3, is in the range of 0.5% to 2.0%.

[0020] In a second aspect, the present application provides a vehicle. The vehicle includes a vehicle body and the sunroof glass described above, and the sunroof glass is connected to the vehicle body.

Brief Description of the Drawings

[0021] To more clearly illustrate the technical solution of the present application, the drawings required for the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings from these drawings without creative efforts. [Figure 1] FIG. 1 is a schematic diagram showing the structure of a vehicle using the sunroof glass according to an embodiment of the present application. [Figure 2] FIG. 2 is a schematic diagram showing a first type of structure of the sunroof glass according to an embodiment of the present application. [Figure 3] FIG. 3 is a schematic diagram showing a second type of structure of the sunroof glass according to an embodiment of the present application. [Figure 4] FIG. 4 is a schematic diagram showing a third type of structure of the sunroof glass according to an embodiment of the present application. [Figure 5] FIG. 5 is a schematic diagram showing a fourth type of structure of the sunroof glass according to an embodiment of the present application. [Figure 6] FIG. 6 is a schematic diagram showing a fifth type of structure of the sunroof glass according to an embodiment of the present application. [Figure 7] FIG. 7 is a schematic diagram showing a sixth type of structure of the sunroof glass according to an embodiment of the present application. [Figure 8] FIG. 8 is a schematic diagram showing a seventh type of structure of the sunroof glass according to an embodiment of the present application. [Figure 9] FIG. 9 is a schematic diagram showing an eighth type of structure of the sunroof glass according to an embodiment of the present application. [Modes for carrying out the invention]

[0022] The specific embodiments of this application will be described in more detail below with reference to the drawings. Although exemplary embodiments of this application are shown in the drawings, this application can also be carried out in ways other than those described herein. Therefore, this application is not limited to the following embodiments.

[0023] Referring together to Figures 1 to 9, the embodiments of this application provide a sunroof glass 10 and a vehicle 100. This makes it possible to reduce the visible light reflectance of the sunroof glass 10 as measured from inside the vehicle, and as a result, eliminate the mirror effect of the sunroof glass when viewed from inside the vehicle, thereby improving the visual experience of passengers when looking out from inside the vehicle.

[0024] Referring to Figure 1, the vehicle 100 comprises a sunroof glass 10 and a vehicle body 20, the sunroof glass 10 being connected to the vehicle body 20. Exemplarily, the sunroof glass 10 may be a panoramic sunroof glass. The visible light transmittance of the sunroof glass 10 may be 30% or less, preferably 20% or less, and specific examples include 19%, 18%, 17%, 16%, 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, and 1%. The visible light reflectance of the sunroof glass 10 measured from inside the vehicle is 4% or less, preferably 3% or less, and more preferably 2% or less.

[0025] Referring to Figure 2, the sunroof glass 10 comprises a glass substrate 11, a metal absorption layer 12, and an anti-reflective layer 13. The metal absorption layer 12 and the anti-reflective layer 13 are sequentially laminated on the glass substrate 11.

[0026] Figure 2 merely illustrates the connection relationships between the glass substrate 11, the metal absorption layer 12, and the anti-reflective layer 13, and does not specifically limit the connection positions, specific structures, and numbers of each device. Furthermore, the exemplary structure of the embodiments of this application does not specifically limit the sunroof glass 10. In other embodiments of this application, the sunroof glass 10 may include more or fewer components than shown in the drawings, may combine certain components, may divide certain components, or may have different component arrangements. The illustrated components can be implemented as hardware, software, or a combination of software and hardware.

[0027] Continuing to refer to Figure 2, the glass substrate 11 has an inner surface 11a and an outer surface 11b provided opposite the inner surface 11a. The inner surface 11a is the surface of the glass substrate 11 facing inward, and the outer surface 11b is the surface of the glass substrate 11 facing outward. Along the direction away from the glass substrate 11, a metal absorption layer 12 and an anti-reflective layer 13 are sequentially laminated on the inner surface 11a.

[0028] The glass substrate 11 may be transparent or colored. The material of the glass substrate 11 may be soda-lime-silica glass, borosilicate glass, aluminosilicate glass, or organic glass. Organic glass may be, for example, polymethyl methacrylate (PMMA) or polycarbonate (PC).

[0029] The glass substrate 11 used as the sunroof glass 10 usually has a curved shape. However, the shape of the glass substrate 11 is not limited to the shape described above, and any shape is acceptable as long as it satisfies the requirements for use of the sunroof glass 10. For example, the glass substrate 11 may be flat. In the embodiments of this application, there are no strict requirements regarding the shape of the glass substrate 11.

[0030] The glass substrate 11 may be a single-layer tempered glass. The thickness of the single-layer tempered glass is 5 mm or more, and may be, for example, 5.1 mm, 5.5 mm, 5.8 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, etc. The single-layer tempered glass may be colored glass, and the total iron content of the colored glass, expressed as Fe2O3, is in the range of 0.5% to 2.0%, such as green glass, blue glass, gray glass, etc.

[0031] Continuing to refer to Figure 2, the glass substrate 11 may be laminated glass. Laminated glass includes an inner glass 111, an outer glass 112, and an intermediate layer 113 connected between the outer glass 112 and the inner glass 111. The inner glass 111 has a first surface 1111 and a second surface 1112 provided opposite the first surface 1111, with the first surface 1111 being the inner surface 11a of the glass substrate 11. The outer glass 112 has a third surface 1121 and a fourth surface 1122 provided opposite the third surface 1121, with the fourth surface 1122 being the outer surface 11b of the glass substrate 11.

[0032] To make it easier to understand, the intermediate layer 113 is used to connect the outer glass 112 and the inner glass 111, so that the entire sunroof glass 10 has a laminated structure. This improves the strength of the glass itself, making it less prone to breakage and improving impact resistance compared to single-layer glass. The improved impact resistance can improve the safety performance of the vehicle, and the reduced likelihood of breakage of the glass itself can reduce maintenance costs.

[0033] The sunroof glass 10 further comprises a dimming element (not shown). The dimming element is provided between the second surface and the third surface. The dimming element may include one or more of the following: polymer dispersed liquid crystal (PDLC) dimming film, polymer network liquid crystal (PNLC) dimming film, suspended particle device (SPD) dimming film, or electrochromic (EC) dimming film.

[0034] Referring to Figure 3, in one possible embodiment, the glass substrate 11 may further include an infrared reflective layer 14. The infrared reflective layer 14 is provided on the second surface 1112 of the inner glass 111 and / or the third surface 1121 of the outer glass 112.

[0035] To make it easier to understand, an infrared reflective layer 14 is provided between the outer glass 112 and the intermediate layer 113, and / or between the inner glass 111 and the intermediate layer 113. The infrared reflective layer 14 includes at least one metallic functional layer and multiple dielectric layers. The metallic functional layer may be, for example, a gold layer, a silver layer, a copper layer, a silver-copper alloy layer, a silver-indium alloy layer, or a silver-gold alloy layer. More specifically, the infrared reflective layer 14 may be a single silver coating (including one silver layer), a double silver coating (including two silver layers), a triple silver coating (including three silver layers), a quadruple silver coating (including four silver layers), or the like. Since the infrared reflective layer 14 can reflect most infrared rays in the wavelength range of 780 nm to 2500 nm, the sunroof glass 10 has solar radiation shielding and heat insulation properties. As a result, thermal comfort inside the vehicle can be improved, and the sunroof glass 10 can adapt to the development trend of panoramic glass.

[0036] In one possible embodiment, the outer glass 112 is arranged parallel to the inner glass 111. In this arrangement, the intermediate layer 113 has a uniform thickness.

[0037] In another possible embodiment, the extending direction of the outer glass 112 intersects with the extending direction of the inner glass 111. In this arrangement, the intermediate layer 113 may be arranged in a structure where the thickness is not uniform but gradually changes. For example, the intermediate layer 113 may be wedge-shaped.

[0038] As can be understood from the above explanation, the thickness of the intermediate layer 113 can be flexibly adjusted according to the actual application scenario of the sunroof glass 10. This is advantageous in adapting to the multi-scenario application demands of the sunroof glass 10.

[0039] For example, both the inner glass 111 and the outer glass 112 may be transparent glass (ordinary clear glass) with a thickness of 2.1 mm. Specifically, the requirement is met if the thickness of both the inner glass 111 and the outer glass 112 is within the range of 0.7 mm to 4.0 mm (including 0.7 mm and 4.0 mm). To meet the requirement of weight reduction, it is preferable that the thickness of the outer glass 112 is 1.6 mm to 4.0 mm, the thickness of the inner glass 111 is 0.7 mm to 2.1 mm, and the thickness of the outer glass 112 is equal to or greater than the thickness of the inner glass 111. The visible light transmittance of the outer glass 112 is 70% or more, preferably 80% or more, and more preferably 90% or more. The visible light transmittance of the inner glass 111 is 70% or more, preferably 80% or more, and more preferably 90% or more. By using ordinary clear glass as the inner glass 111 and outer glass 112, the cost of the product can be significantly reduced and the market competitiveness of the product can be improved.

[0040] In one possible embodiment, the visible light transmittance of the sunroof glass 10 is adjusted by selecting an intermediate layer 113 having different visible light transmittances. Preferably, the visible light transmittance of the intermediate layer 113 is 1% to 30%, such as 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, etc. The material of the intermediate layer 113 can be polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), an ionic polymer film (SentryGlas(R) Plus(SGP)), etc.

[0041] In another possible embodiment, the visible light transmittance of the outer glass 112 is 50% or less, preferably 40% or less, more preferably 30% or less, and even further 20% or less. The visible light transmittance of the inner glass 111 is 50% or less, preferably 40% or less, more preferably 30% or less, and even further 20% or less. The visible light transmittance of the intermediate layer 113 is 70% or more, and as specific examples, it can be 70% or more, 75% or more, 80% or more, 85% or more, and 90% or more. By utilizing a standard transparent intermediate layer such as standard transparent PVB, product costs can be significantly reduced and the market competitiveness of the product can be improved.

[0042] Referring to Figure 2, the metal absorption layer 12 is connected to the first surface 1111 of the inner glass 111. As can be understood, by providing the metal absorption layer 12 on the glass substrate 11, the following can be achieved: On the one hand, the metal absorption layer 12 can adjust the absorption of light to improve the radiance performance and appearance color of the sunroof glass 10. On the other hand, the metal absorption layer 12 can absorb visible light to some extent, reducing the visible light reflectivity of the inner surface 11a of the glass substrate 11 facing inward, allowing the user to see outside better through the sunroof, reducing the impact of light reflected by the inner surface 11a of the glass substrate 11 on the user inside the vehicle, and improving the user experience.

[0043] Exemplary, the metal absorption layer 12 may be a metal coating. The material of the metal absorption layer 12 may be one or more combinations of Ni, Cr, Fe, Ti, Mo, Zr, Si, Nb, etc. The thickness of the metal absorption layer 12 may be 1 nm to 15 nm, preferably 3 nm to 12 nm, and more preferably 5 nm to 10 nm. A metal absorption layer 12 with an appropriate thickness not only plays a role in absorbing visible light, but can also work in cooperation with the anti-reflective layer 13 to further reduce the visible light reflectance of the glass substrate 11.

[0044] Continuing to refer to Figure 2, the anti-reflective layer 13 is provided on one side of the metal absorption layer 12, away from the inner glass 111. For example, the anti-reflective layer 13 can be coated using a magnetron sputtering process. As can be understood, the anti-reflective layer 13 can reduce the visible light reflectance of the glass substrate 11. The cooperation of the anti-reflective layer 13 and the metal absorption layer 12 can further reduce the visible light reflectance of the inner surface 11a of the glass substrate 11, thereby allowing the sunroof glass 10 to be adapted to the trend of panoramic glass applications.

[0045] Furthermore, the cooperation between the anti-reflective layer 13 and the metal absorption layer 12 significantly reduces the visible light reflectivity of the inner surface 11a of the glass substrate 11. As a result, the mirror effect of the sunroof glass 10 when viewed from inside the vehicle is eliminated, improving the user experience.

[0046] In the embodiments of this application, the anti-reflective layer 13 includes at least one laminate comprising a high refractive index layer 131 and a low refractive index layer 132. The high refractive index layer 131 is connected to the metal absorption layer 12, and the low refractive index layer 132 is connected to the high refractive index layer 131 and is separated from the metal absorption layer 12. The refractive index of the high refractive index layer 131 is 1.7 or higher, and the refractive index of the low refractive index layer 132 is less than 1.7.

[0047] A laminate consisting of a high refractive index layer 131 and a low refractive index layer 132 means one formed by sequentially stacking the high refractive index layer 131 and the low refractive index layer 132. For example, one laminate consisting of a high refractive index layer 131 and a low refractive index layer 132 includes, in order, the high refractive index layer 131 and the low refractive index layer 132. Two laminates consisting of a high refractive index layer 131 and a low refractive index layer 132 include, in order, the high refractive index layer 131, the low refractive index layer 132, the high refractive index layer 131 and the low refractive index layer 132. Three laminates consisting of a high refractive index layer 131 and a low refractive index layer 132 include, in order, the high refractive index layer 131 and the low refractive index layer 132. The thickness of the high refractive index layer 131 can be in the range of 1 nm to 70 nm (including 1 nm and 70 nm). In certain application scenarios, the high refractive index layer 131 may further include at least two high refractive index sublayers. For example, a laminate consisting of a high refractive index layer 131 and a low refractive index layer 132 may specifically include, in order, a first high refractive index sublayer, a second high refractive index sublayer, and a low refractive index layer 132. The refractive index of the first high refractive index sublayer is smaller than that of the second high refractive index sublayer. The thickness of the low refractive index layer 132 can be in the range of 20 nm to 150 nm (including 20 nm and 150 nm).

[0048] Exemplarily, the refractive index of the high refractive index layer 131 can be in the range of 1.7 to 2.5 (including 1.7 and 2.5). The refractive index of the low refractive index layer 132 can be in the range of 1.4 to 1.69 (including 1.4 and 1.69). The material of the high refractive index layer 131 is an oxide or alloy oxide of Zn, Sn, Nb, Ti, Ni, Cr, Ta, for example, zinc tin oxide (ZnSnO x ), titanium oxide (TiO x ), niobium oxide (NbO x ), etc. Or, the material of the high refractive index layer 131 can be a nitride or alloy nitride of Si, Zr, Al, for example, silicon nitride (SiN x ), silicon-based aluminum nitride (SiAlN x ), silicon-based zirconium nitride (SiZrN x ), etc. Further, the material of the low refractive index layer 132 can be an oxide or alloy oxide of Si, Zr, Al, for example, silicon oxide (SiO x ), silicon-based aluminum oxide (SiAlO x ), silicon-based zirconium oxide (SiZrO x ), etc. The value of x is determined based on the stoichiometry, substoichiometry or super-stoichiometry method in the magnetron sputtering process.

[0049] Referring together to Figures 2 to 9, the anti-reflective layer 13 may include one laminate consisting of a high refractive index layer 131 and a low refractive index layer 132, or it may include at least two laminates consisting of a high refractive index layer 131 and a low refractive index layer 132. Specifically, the anti-reflective layer 13 may include two laminates, three laminates, four or more laminates. Based on the clear advantages in process manufacturing and cost, it is preferable that the anti-reflective layer 13 includes only one laminate consisting of a high refractive index layer 131 and a low refractive index layer 132. In the embodiments of this application, through the cooperation of the metal absorption layer 12 and the anti-reflective layer 13, the anti-reflective layer 13 containing only one laminate can achieve the same level of anti-reflective effect as conventional anti-reflective layers containing two, three, or even four laminates.

[0050] In specific application scenarios, as shown in Figures 2, 3, 6, 7, 8, and 9, the anti-reflective layer 13 comprises only one laminate consisting of a high refractive index layer 131 and a low refractive index layer 132, and in the direction toward the interior of the vehicle from the inner surface 11a of the glass substrate 11, the laminate is provided in a high refractive index layer 131-low refractive index layer 132 structure. Specifically, along the direction away from the inner surface 11a, the anti-reflective layer 13 includes the high refractive index layer 131 and the low refractive index layer 132 which are sequentially laminated on one side of the metal absorption layer 12 away from the inner glass 111.

[0051] In another specific application scenario, the high refractive index layer 131 in the anti-reflective layer 13 includes two high refractive index sublayers, and the anti-reflective layer 13 is provided in a first high refractive index sublayer 1311-second high refractive index sublayer 1312-low refractive index layer 132 structure in the direction away from the inner surface 11a of the inner glass 111. Specifically, as shown in Figure 4, along the direction away from the inner surface 11a of the inner glass 111, the laminated structure includes the first high refractive index sublayer 1311, the second high refractive index sublayer 1312, and the low refractive index layer 132, which are sequentially laminated on one side of the metal absorption layer 12 away from the inner glass 111. The refractive index of the first high refractive index sublayer 1311 is smaller than the refractive index of the second high refractive index sublayer 1312.

[0052] In yet another specific application scenario, the anti-reflective layer 13 includes two laminates consisting of a high refractive index layer 131 and a low refractive index layer 132, where the two laminates have a structure in which the high refractive index layer 131 and the low refractive index layer 132 are periodically alternated along the direction away from the inner surface 11a of the inner glass 111, and the outermost layer (i.e., the layer furthest from the first surface 1111 of the inner glass 111) is the low refractive index layer 132. Specifically, as shown in Figure 5, the anti-reflective layer 13 includes a first high refractive index layer 131a, a first low refractive index layer 132a, a second high refractive index layer 131b, and a second low refractive index layer 132b, which are sequentially laminated on the inner glass 111. The material of the first high refractive index layer 131a and the material of the second high refractive index layer 131b may be the same or different. The thickness of the first high refractive index layer 131a and the thickness of the second high refractive index layer 131b may be the same or different. The material of the first low refractive index layer 132a and the material of the second low refractive index layer 132b may be the same or different. The thickness of the first low refractive index layer 132a and the thickness of the second low refractive index layer 132b may be the same or different.

[0053] In the embodiments of this application, by selecting a suitable glass substrate 11 and adjusting the material and thickness of the metal absorption layer 12 and the anti-reflective layer 13, the reflective color of the sunroof glass 10 measured from the inner surface 11a side in Lab color space is in the range of a-values ​​from -6 to 2 (including -6 and 2) and b-values ​​from -12 to 0 (including -12 and 0). As a result, the color of the sunroof glass 10 when viewed from inside the vehicle is a preferred intermediate color, providing a better visual effect for passengers inside the vehicle.

[0054] In one possible embodiment, as shown in Figure 6, the sunroof glass 10 may further comprise a first protective layer 15. The first protective layer 15 is provided directly on the first surface 1111 of the inner glass 111, i.e., the first protective layer 15 is provided between the inner surface 11a of the glass substrate 11 and the metal absorption layer 12. During the bending molding process of the inner glass 111 at a high temperature of at least 500°C, the first protective layer 15 can block damage and oxidation of the metal absorption layer 12 due to the diffusion of alkali metal ions and oxygen across the surface of the inner glass 111.

[0055] For example, the thickness of the first protective layer 15 may be 5 nm or more. The material of the first protective layer 15 may include oxides or alloy oxides of Zn, Sn, Ti, Si, Al, Nb, Zr, Ni, Mg, Cr, Ta, etc., or may include nitrides or alloy oxynitrides of Si, Al, Zr, B, Ti, etc. An alloy oxide is an oxide of at least two elements. An alloy oxynitride is an oxynitride of at least two elements.

[0056] In another possible embodiment, as shown in Figure 7, the sunroof glass 10 may further comprise a second protective layer 16. The second protective layer 16 is provided on one side of the anti-reflective layer 13, away from the metal absorption layer 12; that is, the second protective layer 16 is provided as the outermost layer of the coating structure of the sunroof glass 10. The second protective layer 16 contributes to further improving the overall mechanical and thermal stability of the coating.

[0057] For example, the material of the second protective layer 16 may be a nitride or alloy oxynitride such as Si, Al, Zr, Ti, B, Ni, for example, SiN x SiAlN x SiZrN x This may include the following. The thickness of the second protective layer 16 is 3 nm or more. Considering the influence of the second protective layer 16 on the anti-reflective layer 13, it is preferable that the thickness of the second protective layer 16 be 30 nm or less. More preferably, the thickness of the second protective layer 16 is 5 nm to 20 nm.

[0058] In yet another possible embodiment, as shown in Figure 8, the sunroof glass 10 may further comprise a first protective layer 15 and a second protective layer 16. The first protective layer 15 is provided between the metal absorption layer 12 and the inner glass 111, and the second protective layer 16 is provided on the surface of the anti-reflective layer 13 away from the metal absorption layer 12.

[0059] Furthermore, the color of the sunroof glass 10 can be adjusted not only by adjusting the material and thickness of the metal absorption layer 123 and the anti-reflective layer 13, but also by adjusting the material and thickness of the first protective layer 15 and the second protective layer 16. The embodiments of this application are not strictly limited thereto.

[0060] Referring to Figure 9, in embodiments of this application, the sunroof glass 10 may further comprise a low-emissivity layer 17. The low-emissivity layer 17 is provided between the first protective layer 15 and the metal absorption layer 12. The low-emissivity layer 17 is used to reduce the emissivity of the sunroof glass 10 as measured from the inner surface 11a side. The emissivity of the sunroof glass 10 as measured from the inner surface 11a side is in the range of 0.01 to 0.25 (including 0.01 and 0.25). This allows for better insulation of heat transfer between the inside and outside of the vehicle. The low-emissivity layer 17 includes one or more of the following: an indium tin oxide (ITO) layer, a fluorine-doped tin oxide (FTO) layer, an antimony tin oxide (ATO) layer, and an aluminum-doped zinc oxide (AZO) layer. A barrier layer 18 is further provided between the low-emission layer 17 and the metal-absorbing layer 12. On the first surface 1111, a first protective layer 15, a low-emission layer 17, a barrier layer 18, a metal-absorbing layer 12, a high-refractive-index layer 131, a low-refractive-index layer 132, and a second protective layer 16 can be provided in that order.

[0061] Specifically, the first protective layer 15 can be provided directly on the first surface 1111. The low-emission layer 17 is provided on one side of the first protective layer 15, away from the inner glass 111. The barrier layer 18 is provided on one side of the low-emission layer 17, away from the first protective layer 15. To understand this, by providing the first protective layer 15 on the surface of the inner glass 111, alkali metal ions and other substances in the inner glass 111 can be prevented from entering the coating structure, and the optical layer between the first protective layer 15 and the second protective layer 16 can be protected. By providing the low-emission layer 17 on one side of the first protective layer 15, away from the glass substrate 11, the sunroof glass 10 can have an excellent low-emission effect. In addition, the barrier layer 18 is provided on one side of the low-emission layer 17, away from the first protective layer 15. Since the barrier layer 18 is located between the metal absorption layer 12 and the low-emission layer 17, it is possible to prevent the performance degradation or even ineffectiveness of the metal absorption layer 12 or the low-emission layer 17 due to the mutual influence between the metal absorption layer 12 and the low-emission layer 17.

[0062] This application further provides a method for manufacturing a sunroof glass 10. For the specific structure of the sunroof glass 10, please refer to Figures 1 to 9 and the above description. Improvements to the sunroof glass 10 described below can be applied to the above description of the sunroof glass 10, provided there is no contradiction. The method includes the following:

[0063] S100: Provides an inner glass 111. The inner glass 111 includes a first surface 1111 and a second surface 1112 facing the first surface 1111.

[0064] S200: A metal absorption layer 12 and an anti-reflective layer 13 are sequentially laminated on the first surface 1111 of the inner glass 111.

[0065] S300: A glass substrate 11 is manufactured. The glass substrate 11 includes an inner glass 111, an outer glass 112, and an intermediate layer 113 connected between the inner glass 111 and the outer glass 112. The inner surface 11a of the glass substrate 11 is the first surface 1111 of the inner glass 111.

[0066] The following describes the specific steps for the S200 and S300.

[0067] S200: A metal absorption layer 12 and an anti-reflective layer 13 are sequentially laminated on the first surface 1111 of the inner glass 111.

[0068] First, a metal absorption layer 12 and an anti-reflective layer 13 are deposited on the first surface 1111 by a magnetron sputtering process.

[0069] As an example, the first protective layer 15, the low-emission layer 17, the barrier layer 18, the metal absorption layer 12, the high-refractive-index layer 131, the low-refractive-index layer 132, and the second protective layer 16 are sequentially deposited on the first surface 1111 of the inner glass 111 by a magnetron sputtering process.

[0070] S300: Manufactures a glass substrate 11.

[0071] The glass substrate 11 includes an inner glass 111, an outer glass 112, and an intermediate layer 113 connected between the inner glass 111 and the outer glass 112. The inner surface 11a of the glass substrate 11 is the first surface 1111 of the inner glass 111. After depositing a metal absorption layer 12 and an anti-reflective layer 13 on the inner glass 111 by a magnetron sputtering process, a first protective layer 15, a low-emissivity layer 17, a barrier layer 18, a second protective layer 16, etc. may be further deposited, and an infrared reflective layer 14 may be further deposited on the third surface 1121 of the outer glass 112, and the outer glass 112 and inner glass 111 can be subjected to high-temperature bending molding. The high-temperature bending molding can be performed in the range of 550°C to 700°C (including 550°C and 700°C). After that, the outer glass 112 and the inner glass 11 are connected by the intermediate layer 113. The visible light transmittance of the intermediate layer 113 can be in the range of 1% to 30%. The manufacturing process for vehicle glass forms a laminated glass structure with the outer glass 112, the inner glass 111, and the intermediate layer 113.

[0072] Furthermore, this application provides six examples and four comparative examples for analyzing and examining the performance of the sunroof glass 10.

[0073] <Example 1>

[0074] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. By magnetron sputtering, a first protective layer 15 (a Si3N4 layer with a thickness of 10 nm), a metal absorption layer 12 (a NiCr layer with a thickness of 6.5 nm), a high refractive index layer (a TiO2 layer with a thickness of 26 nm), and a low refractive index layer (an SiO2 layer with a thickness of 36 nm) are sequentially deposited on the first surface 1111 of the inner glass 111. The 26 nm thick TiO2 layer and the 36 nm thick SiO2 layer constitute the anti-reflective layer 13. After the deposition of the coatings is complete, the outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a gray PVB with a thickness of 0.76 mm and a visible light transmittance of approximately 10% is prepared as an intermediate layer 113. The laminated glass structure is formed by the manufacturing process of vehicle glass.

[0075] <Example 2>

[0076] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. By magnetron sputtering, a metal absorption layer 12 (a NiCr layer with a thickness of 6.5 nm), a high refractive index layer (a TiO2 layer with a thickness of 26 nm), a low refractive index layer (an SiO2 layer with a thickness of 32 nm), and a second protective layer 16 (a Si3N4 layer with a thickness of 15 nm) are sequentially deposited on the first surface 1111 of the inner glass 111. The 26 nm thick TiO2 layer and the 32 nm thick SiO2 layer constitute the anti-reflective layer 13. After the deposition of the coatings is complete, the outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a PVB with a thickness of 0.76 mm and a visible light transmittance of approximately 10% is prepared as an intermediate layer 113. The laminated glass structure is formed by the manufacturing process of vehicle glass.

[0077] <Example 3>

[0078] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. By magnetron sputtering, a first protective layer 15 (a Si3N4 layer with a thickness of 10 nm), a metal absorption layer 12 (a NiCr layer with a thickness of 6.5 nm), a high refractive index layer (a TiO2 layer with a thickness of 26 nm), a low refractive index layer (an SiO2 layer with a thickness of 34 nm), and a second protective layer 16 (a Si3N4 layer with a thickness of 15 nm) are sequentially deposited on the first surface 1111 of the inner glass 111. The 26 nm thick TiO2 layer and the 34 nm thick SiO2 layer constitute the anti-reflective layer 13. After the deposition of the coatings is complete, the outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a PVB with a thickness of 0.76 mm and a visible light transmittance of approximately 10% is prepared as an intermediate layer 113. A laminated glass structure is formed by the manufacturing process of vehicle glass.

[0079] <Example 4>

[0080] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. By magnetron sputtering, a first protective layer 15 (10 nm thick ZnSnO) is applied to the first surface 1111 of the inner glass 111. x The following layers are sequentially deposited: a metal absorption layer 12 (a NiCr layer with a thickness of 6.5 nm), a high refractive index layer (a TiO2 layer with a thickness of 26 nm), a low refractive index layer (an SiO2 layer with a thickness of 34 nm), and a second protective layer 16 (a Si3N4 layer with a thickness of 15 nm). The 26 nm thick TiO2 layer and the 34 nm thick SiO2 layer constitute the anti-reflective layer 13. After the coating deposition is complete, the outer glass 112 and inner glass 111 are subjected to high-temperature bending and molding. Next, a PVB layer with a thickness of 0.76 mm and a visible light transmittance of approximately 10% is prepared as an intermediate layer 113. The laminated glass structure is formed by the manufacturing process of vehicle glass.

[0081] <Example 5>

[0082] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. By magnetron sputtering, the following layers are sequentially deposited on the first surface 1111 of the inner glass 111: a first protective layer 15 (a 10 nm thick Si3N4 layer), a low-emissivity layer 17 (a 138 nm thick ITO layer), a barrier layer 18 (a 10 nm thick Si3N4 layer), a metal absorption layer 12 (an 8.5 nm thick NiCr layer), a high refractive index layer (a 34 nm thick TiO2 layer), a low refractive index layer (a 63 nm thick SiO2 layer), and a second protective layer 16 (a 10 nm thick Si3N4 layer). The 34 nm thick TiO2 layer and the 63 nm thick SiO2 layer constitute the anti-reflective layer 13. After the deposition of the coatings is complete, the outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a PVB layer with a visible light transmittance of approximately 10% and a thickness of 0.76 mm is prepared as an intermediate layer 113. A laminated glass structure is formed using the manufacturing process for vehicle glass.

[0083] <Example 6>

[0084] Both the outer glass 112 and the inner glass 111 are 2.1 mm thick gray glass with a transmittance of approximately 40% to 50%. By magnetron sputtering, a first protective layer 15 (a 10 nm thick SiN layer), a metal absorption layer 12 (a 7.2 nm thick NiCr layer), a high refractive index layer (a 26 nm thick TiO2 layer), a low refractive index layer (a 36 nm thick SiO2 layer), and a second protective layer 16 (a 15 nm thick Si3N4 layer) are sequentially deposited on the first surface 1111 of the inner glass 111. The 26 nm thick TiO2 layer and the 36 nm thick SiO2 layer constitute the anti-reflective layer 13. After the coating deposition is complete, the outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a 0.76 mm thick PVB with a visible light transmittance of approximately 90% is prepared as an intermediate layer 113. The laminated glass structure is formed by the manufacturing process of vehicle glass.

[0085] <Comparative Example 1>

[0086] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. No coating is deposited. The outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a PVB with a thickness of 0.76 mm and a visible light transmittance of approximately 10% is prepared as an intermediate layer 113. A laminated glass structure is formed by the manufacturing process of vehicle glass.

[0087] <Comparative Example 2>

[0088] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. By magnetron sputtering, a high refractive index layer (a TiO2 layer with a thickness of 5 nm) and a low refractive index layer (an SiO2 layer with a thickness of 130 nm) are sequentially deposited on the first surface 1111 of the inner glass 111, without depositing a metal absorption layer 12. The 5 nm thick TiO2 layer and the 130 nm thick SiO2 layer constitute an anti-reflective layer 13. After the coating deposition is complete, the outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a PVB with a thickness of 0.76 mm and a visible light transmittance of approximately 10% is prepared as an intermediate layer 113. The laminated glass structure is formed by the manufacturing process of vehicle glass.

[0089] <Comparative Example 3>

[0090] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. By magnetron sputtering, a high refractive index layer (10 nm thick TiO2 layer), a low refractive index layer (48 nm thick SiO2 layer), a high refractive index layer (106 nm thick TiO2 layer), and a low refractive index layer (96 nm thick SiO2 layer) are sequentially deposited on the first surface 1111 of the inner glass 111, without depositing a metal absorption layer 12. The 10 nm thick TiO2 layer, the 48 nm thick SiO2 layer, the 106 nm thick TiO2 layer, and the 96 nm thick SiO2 layer constitute an anti-reflective layer 13. After the coating deposition is complete, the outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a 0.76 mm thick PVB with a visible light transmittance of approximately 10% is prepared as an intermediate layer 113. A laminated glass structure is formed by the manufacturing process of vehicle glass.

[0091] <Comparative Example 4>

[0092] Both the outer glass 112 and the inner glass 111 are ordinary clear glass with a thickness of 2.1 mm. By magnetron sputtering, a first protective layer 15 (a Si3N4 layer with a thickness of 16 nm), a metal absorption layer 12 (a NiCr layer with a thickness of 7.5 nm), and a second protective layer 16 (a Si3N4 layer with a thickness of 58 nm) are sequentially deposited on the first surface 1111 of the inner glass 111, but no anti-reflective layer 13 is deposited. After the deposition of the coatings is complete, the outer glass 112 and the inner glass 111 are subjected to high-temperature bending molding. Next, a PVB with a thickness of 0.76 mm and a visible light transmittance of approximately 10% is prepared as an intermediate layer 113. A laminated glass structure is formed by the manufacturing process of vehicle glass.

[0093] The visible light reflectance and reflected color of the laminated glass structures of Comparative Examples 1-4 and Example 3 were measured, and the measurement results are shown in Table 1.

[0094] [Table 1]

[0095] The visible light reflectance of the inner glass measured from the first surface side (after high-temperature heat treatment) is the visible light reflectance of a single inner glass pane measured directly from the first surface side after high-temperature bending molding treatment has been performed on the inner glass with the coating deposited, but before the laminated glass structure is formed. The visible light reflectance of the sunroof glass measured from the inner surface side is the visible light reflectance of the sunroof glass measured from the inner surface side after the laminated glass structure has been formed by the outer glass that has undergone high-temperature bending molding treatment in the manufacturing process of vehicle glass, the inner glass with the coating deposited, and the intermediate layer.

[0096] As can be seen from Table 1, in Comparative Example 1, the visible light reflectance of the inner glass 111, on which the metal absorption layer 12 and anti-reflective layer 13 were not deposited, was 8% or more. Subsequently, even when a laminated glass structure was formed as a sunroof glass 10 using the inner glass 111 on which the metal absorption layer 12 and anti-reflective layer 13 were not deposited, the intermediate layer 113, and the outer glass 112, the visible light reflectance of the sunroof glass 10 measured from the inner surface 11a side was still 4% or more, indicating a relatively clear mirror effect.

[0097] In Comparative Example 2, by placing one anti-reflective layer 13, i.e., a laminate consisting of a high refractive index layer 131 and a low refractive index layer 132, the visible light reflectance of the first surface 1111 of the inner glass 111 is reduced to 5% to 6%. The anti-reflective layer 13, the inner glass 111, the intermediate layer 113, and the outer glass 112 form a laminated glass structure to create the sunroof glass 10. The visible light reflectance of the sunroof glass 10 measured from the inner surface 11a side is less than 3%. However, a color test in the Lab color space revealed that the reflected color of the sunroof glass 10 when viewed from inside the car is reddish-purple, and this reflected color is clearly deviated from the intermediate color. This is unlikely to be acceptable to passengers.

[0098] In Comparative Example 3, the visible light reflectance of the first surface 1111 of the inner glass 111 is reduced to 4% to 5% by arranging two laminates consisting of a high refractive index layer 131 and a low refractive index layer 132. The two laminates consisting of the high refractive index layer 131 and the low refractive index layer 132, the inner glass 111, the intermediate layer 113, and the outer glass 112 form a laminated glass structure to create the sunroof glass 10. The visible light reflectance of the sunroof glass 10 measured from the inner surface 11a side is less than 2%. The reflected color of the sunroof glass 10 when viewed from inside the car is an intermediate color, but the total thickness of the coating is 260 nm, which is disadvantageous in the manufacturing process and results in relatively high manufacturing costs.

[0099] In Comparative Example 4, a nickel-chromium alloy (NiCr) was used as the metal absorption layer 12, and the visible light reflectance of the first surface 1111 of the inner glass 111 was 4% or less. The metal absorption layer 12, the inner glass 111, the intermediate layer 113, and the outer glass 112 formed a laminated glass structure to create the sunroof glass 10. The visible light reflectance of the sunroof glass 10 measured from the inner surface 11a side was less than 3%. However, a color test in the Lab color space revealed that the reflected color of the sunroof glass 10 when viewed from inside the car was clearly deviated from the intermediate color. This reflected color is unlikely to be acceptable to passengers.

[0100] As can be seen from the comparison, the visible light reflectance of the first surface 1111 of the inner glass 111 in the coating structure of Example 3 is less than 4%. The coating structure, the inner glass 111, the intermediate layer 113, and the outer glass 112 form a laminated glass structure to create the sunroof glass 10. The visible light reflectance of the sunroof glass 10 measured from the inner surface 11a side is less than 2%. In addition, the reflected color of the sunroof glass 10 when viewed from inside the car satisfies the requirement of an intermediate color. Compared to Comparative Example 3, the total thickness of the coating in Example 3 is about 1 / 3 of the total thickness of the coating in Comparative Example 3, which has clear advantages in terms of process manufacturing and cost.

[0101] The visible light reflectance and reflected color of the laminated glass structures of Examples 1 to 6 were measured, and the measurement results are shown in Table 2.

[0102] [Table 2]

[0103] The visible light reflectance of the inner glass measured from the first surface side (before high-temperature heat treatment) is the visible light reflectance of a single sheet of inner glass measured directly from the first surface side after the coating has been laminated onto the inner glass and before the high-temperature bending and molding process. The visible light reflectance of the inner glass measured from the first surface side (after high-temperature heat treatment) is the visible light reflectance of a single sheet of inner glass measured directly from the first surface side after the coating has been laminated onto the inner glass and before the laminated glass structure is formed. The visible light reflectance of the sunroof glass measured from the inner surface side is the visible light reflectance of the sunroof glass measured from the inner surface side after the laminated glass structure has been formed by the outer glass that has undergone high-temperature bending and molding in the manufacturing process of vehicle glass, the inner glass with a deposited coating, and an intermediate layer.

[0104] As can be seen from Table 2, in Examples 1 to 6, the visible light reflectance of the sunroof glass 10 measured from the inner surface 11a side is less than 4%, less than 3%, and less than 2% in all cases. Furthermore, in the Lab color space, the reflected color of the sunroof glass 10 in Examples 1 to 6, measured from the inner surface 11a side, is in the range of a-values ​​from -6 to 2 (including -6 and 2) and b-values ​​from -12 to 0 (including -12 and 0). In other words, in Examples 1 to 6, the sunroof glass 10 can eliminate the mirror effect inside the vehicle while simultaneously having excellent intermediate colors when viewed from inside the vehicle. In Example 6, gray glass is used for both the outer and inner glass, but the technical proposal of the present invention still allows for a visible light reflectance of less than 2% and satisfies the requirement for intermediate colors.

[0105] In Examples 1-4 and 6, the total thickness of the first protective layer 15, the metal absorption layer 12, the anti-reflective layer 13, and the second protective layer 16 is 200 nm or less, preferably 150 nm or less, and even more preferably 100 nm or less, which offers clear advantages in terms of process manufacturing and cost.

[0106] Furthermore, as can be seen from Example 2, if the first protective layer 15 is not provided, the metal absorption layer 12 may partially oxidize during the high-temperature bending and molding process of the inner glass 111 with the coating laminated on it, and ultimately, the visible light reflectance of the inner glass 111 measured from the first surface side after the high-temperature bending and molding process increases significantly. After forming a laminated glass structure with the inner glass 111 without the first protective layer 15, the intermediate layer 113, and the outer glass 112 to form the sunroof glass 10, the visible light reflectance of the sunroof glass 10 measured from the inner surface 11a side is less than 4%, and the reflected color of the sunroof glass 10 when viewed from inside the car also satisfies the requirements for an intermediate color, but the value of the reflected color in Lab space in Example 2 is not as good as in the other examples.

[0107] In Example 4, ZnSnO was used as the material for the first protective layer 15. x In Example 3, Si3N4 is used as the material for the first protective layer 15. The visible light reflectance of the inner glass 111 is measured from the first surface side. Compared to Example 3, the change in visible light reflectance before and after the high-temperature bending molding process in Example 4 is greater than the change in visible light reflectance in Example 3. Preferably, the material of the first protective layer 15 contains a Si nitride. This improves the thermal stability of the coating and suppresses the degree of oxidation of the metal absorption layer 12.

[0108] As can be seen from Example 5, the sunroof glass 10 has a low-emissivity function due to the additional low-emissivity layer 17, but it can still maintain a relatively low visible light reflectivity and excellent intermediate colors.

[0109] The above is an exemplary embodiment of the present application. Those skilled in the art can make some improvements and embellishments, as long as they do not deviate from the principles of the present application, and such improvements and embellishments should also fall within the scope of protection of the present application.

Claims

1. A sunroof glass comprising a glass substrate, a metal absorption layer, and an anti-reflective layer, wherein the glass substrate has an outer surface and an inner surface, and the metal absorption layer and the anti-reflective layer are sequentially laminated on the inner surface along a direction away from the glass substrate. The anti-reflective layer comprises at least one laminate consisting of a high refractive index layer and a low refractive index layer, wherein the refractive index of the high refractive index layer is 1.7 or higher, the refractive index of the low refractive index layer is less than 1.7, the thickness of the high refractive index layer is in the range of 1 nm to 70 nm, and the thickness of the low refractive index layer is in the range of 20 nm to 150 nm. The sunroof glass does not have a low-emissivity layer, and the total thickness of the metal absorption layer and the anti-reflective layer is 100 nm or less. The low-emission layer includes one or more of the following: an indium tin oxide (ITO) layer, a fluorine-doped tin oxide (FTO) layer, an antimond-doped tin oxide (ATO) layer, and an aluminum-doped zinc oxide (AZO) layer. The material of the metal absorption layer is one or more combinations of Ni, Cr, Fe, Ti, Mo, Zr, Si, and Nb, and the thickness of the metal absorption layer is 1 nm to 15 nm. The visible light transmittance of the sunroof glass is in the range of 1% to 20%, the visible light reflectance of the sunroof glass measured from the inner surface is 4% or less, and in the Lab color space, the reflected color of the sunroof glass measured from the inner surface has an a value in the range of -6 to 2 and a b value in the range of -12 to 0. A sunroof glass characterized by the following features.

2. The sunroof glass further comprises a first protective layer, the first protective layer being provided on the inner surface and located between the inner surface and the metal absorption layer, the thickness of the first protective layer being 5 nm or more, and the material of the first protective layer comprising an oxide or alloy oxide of Zn, Sn, Ti, Si, Al, Nb, Zr, Ni, Mg, Cr, or Ta, or comprising a nitride or alloy oxynitride of Si, Al, Zr, B, or Ti. The sunroof glass according to feature 1.

3. The sunroof glass further comprises a second protective layer, the second protective layer being provided on the surface of the anti-reflective layer away from the metal absorption layer, the material of the second protective layer comprising a nitride or alloy oxynitride of Si, Al, Zr, Ti, B, or Ni, and the thickness of the second protective layer being 3 nm or more and 30 nm or less. The sunroof glass according to feature 1.

4. The glass substrate is laminated glass, and the laminated glass includes an inner glass, an outer glass, and an intermediate layer connected between the outer glass and the inner glass, the inner glass having a first surface and a second surface facing the first surface, the first surface being the inner surface, and the outer glass having a third surface and a fourth surface facing the third surface, the fourth surface being the outer surface. The sunroof glass according to feature 1.

5. The glass substrate further includes an infrared reflective layer, the infrared reflective layer is provided on the second surface and / or the third surface. The sunroof glass according to feature 4.

6. The visible light transmittance of the outer glass is 70% or more, the visible light transmittance of the inner glass is 70% or more, and the visible light transmittance of the intermediate layer is in the range of 1% to 30%. The sunroof glass according to feature 4.

7. The visible light transmittance of the outer glass is 50% or less, the visible light transmittance of the inner glass is 50% or less, and the visible light transmittance of the intermediate layer is 70% or more. The sunroof glass according to feature 4.

8. A light-adjusting element is further provided between the second surface and the third surface, and the light-adjusting element includes one or more of the following: polymer dispersed liquid crystal (PDLC) light-adjusting film, polymer network liquid crystal (PNLC) light-adjusting film, suspended particle device (SPD) light-adjusting film, or electrochromic (EC) light-adjusting film. The sunroof glass according to feature 4.

9. The glass substrate is a single-layer tempered glass, the thickness of the single-layer tempered glass is 5 mm or more, the single-layer tempered glass is colored glass, and the colored glass contains Fe ２ O ３ The total iron content, expressed as such, is in the range of 0.5% to 2.0%. The sunroof glass according to feature 1.

10. The thickness of the metal absorption layer is 3 nm to 12 nm, or the thickness of the metal absorption layer is 5 nm to 10 nm. The sunroof glass according to feature 1.

11. The sunroof glass further comprises a first protective layer and a second protective layer, and the total thickness of the first protective layer, the metal absorption layer, the anti-reflective layer, and the second protective layer is 100 nm or less. The sunroof glass according to feature 1.

12. It is a vehicle, The vehicle comprises a body and a sunroof glass according to any one of claims 1 to 11, wherein the sunroof glass is connected to the body. A vehicle characterized by the following features.

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